Patents by Inventor Takashi Katsuki
Takashi Katsuki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6911973Abstract: A touch panel device is provided that can detect a touched position with sufficient resolution and accuracy without requiring high accuracy in process for forming a piezoelectric thin film. In the middle portion of the glass substrate, a substantially rectangular touch area is provided. In the periphery of the touch area, plural transmission comb electrodes arranged along one of the neighboring sides of the touch area and plural reception comb electrodes arranged along the other of the neighboring sides make pairs. Surface acoustic wave signals propagate from the transmission comb electrodes to the reception comb electrodes in a slanting direction with respect to four sides of the touch area. The inside edge of the piezoelectric thin film is formed linearly along the sides of the touch area.Type: GrantFiled: November 5, 2001Date of Patent: June 28, 2005Assignee: Fujitsu LimitedInventors: Takashi Katsuki, Fumihiko Nakazawa, Satoshi Sano, Yuji Takahashi
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Publication number: 20050073505Abstract: A piezoelectric element includes a substrate, a lower electrode on the substrate, a piezoelectric layer on the lower electrode, and an upper electrode on the piezoelectric layer. The upper electrode includes a common base and a plurality of parallel branches extending from the base. The branches are arranged at a regular interval or pitch ?1. The lower electrode faces the branches of the upper electrode via the piezoelectric layer. The thickness h of the piezoelectric layer and the branch pitch ?1 are determined to satisfy an inequality 0.005?h/?1?0.1. The lower electrode has a hillock occurrence rate which is no greater than 0.1%.Type: ApplicationFiled: February 20, 2004Publication date: April 7, 2005Applicant: FUJITSU LIMITEDInventors: Takashi Katsuki, Fumihiko Nakazawa, Satoshi Sano, Yuji Takahashi
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Publication number: 20040146195Abstract: To provide a printing inspection apparatus and a printing inspection method enabling an optimal inspection mode in which a balance is kept between the improvement of production efficiency and the securing of a printing accuracy.Type: ApplicationFiled: July 24, 2003Publication date: July 29, 2004Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Takahiro Fukagawa, Yuji Otake, Takashi Katsuki, Minoru Murakami, Kimiyuki Yamasaki
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Patent number: 6768484Abstract: In a touch panel device for detecting a position touched by an object by sensing an attenuation or break of surface acoustic waves, in which IDTs for exciting or receiving surface acoustic waves comprising comb-like electrode fingers aligned along confronting bus electrodes are placed on a peripheral area of a substrate, drawing electrodes connected to the bus electrode positioned closer to the center of the substrate and led out to the peripheral area side of the substrate are provided. Each of the IDT regions segmented by the drawing electrodes is constituted by repetition, and the drawing electrodes are disposed so that impedance in each IDT region becomes equal.Type: GrantFiled: January 25, 2002Date of Patent: July 27, 2004Assignee: Fujitsu LimitedInventors: Satoshi Sano, Takashi Katsuki, Yuji Takahashi, Fumihiko Nakazawa
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Patent number: 6756973Abstract: Surface acoustic waves are excited in two diagonal directions from each of IDTs (excitation elements) disposed on the upper side and the lower side of a non-piezoelectric substrate, and the surface acoustic waves propagated on a detection region are received by IDTs (receiving elements) disposed on the left side and right side of the non-piezoelectric substrate so that a position of an object touching the non-piezoelectric substrate is detected based on the reception results. In each IDT, comb-like electrode fingers are joined to two facing electrode bases (signal electrode and ground electrode) in such a manner that the comb-like electrode fingers are inclined from a facing direction of the electrode bases.Type: GrantFiled: May 30, 2001Date of Patent: June 29, 2004Assignee: Fujitsu LimitedInventors: Satoshi Sano, Fumihiko Nakazawa, Takashi Matsuda, Yoshio Satoh, Takashi Katsuki, Yuji Takahashi
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Patent number: 6750853Abstract: A surface acoustic waves is excited from an excitation element disposed on a substrate, the surface acoustic wave propagated on the substrate is received by a receiving element positioned on the substrate so as to face the excitation element, and the position of an object touching the substrate is detected based on the reception result. The wave number of a burst wave applied to excite the excitation element is made equal to the number of the comb-like electrode fingers of an IDT of the excitation element.Type: GrantFiled: September 25, 2001Date of Patent: June 15, 2004Assignee: Fujitsu LimitedInventors: Yuji Takahashi, Fumihiko Nakazawa, Satoshi Sano, Takashi Katsuki
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Publication number: 20040104827Abstract: Each of an excitation element for exciting surface acoustic waves in two directions and a receiving element for receiving surface acoustic waves from two directions is constructed by forming a comb-like electrode on the front surface of a piezoelectric body in the form of a thin film and a plate electrode on the rear surface thereof. The comb-like electrode on the front surface has one line of bus electrode, and a plurality of electrode fingers which are extended from the bus electrode and bent in V-shape in the middle. The voltage in the excitation element and in the receiving element is controlled by providing a terminal resistance for preventing reflection of an applied AC voltage at the terminal end, between the terminal end portion of the comb-like electrode and the plate electrode, or adjusting the resistance value of the bus electrode and/or the plate electrode, or adjusting the capacitance value between the electrode finger and the plate electrode.Type: ApplicationFiled: November 12, 2003Publication date: June 3, 2004Applicant: FUJITSU LIMITEDInventors: Takashi Katsuki, Fumihiko Nakazawa, Satoshi Sano, Yuji Takahashi
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Publication number: 20040090432Abstract: A burst wave is applied to an excitation element of a touch panel main body from an oscillation section so as to excite surface acoustic waves, and the excited surface acoustic waves are received by a receiving element of the touch panel main body. The received signals are A/D converted by a receiving section, and a control section calculates the contact position and the contact width of the object in contact with the touch panel main body, based on time-series changes in the received strength. Based on the received strength of surface acoustic waves, the control section controls the wave number of the burst wave to be applied to the excitation element.Type: ApplicationFiled: October 30, 2003Publication date: May 13, 2004Applicant: FUJITSU LIMITED,Inventors: Yuji Takahashi, Fumihiko Nakazawa, Satoshi Sano, Takashi Katsuki
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Publication number: 20040031406Abstract: It is an object of the invention to provide a method for forming printing inspection data in which the use of a mask plate makes it possible to simply and efficiently form the inspecting data.Type: ApplicationFiled: August 18, 2003Publication date: February 19, 2004Applicant: Matsushita Electric Industrial Co., Ltd.Inventors: Yuji Otake, Takahiro Fukagawa, Takashi Katsuki
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Publication number: 20040027342Abstract: Each of excitation elements and receiving elements placed in a frame region of a non-piezoelectric substrate is constructed by forming a comb-like electrode on the front face of a piezoelectric body and forming a plate electrode (solid electrode) on the rear face thereof. The comb-like electrode is composed of a bus electrode and a plurality of V-shaped electrode fingers extended from the bus electrode. Drawn-round wires are provided to connect the comb-like electrode (bus electrode) and plate electrode to external circuits. Surface acoustic waves from the excitation elements located on the upper side and the lower side are simultaneously propagated in two directions respectively and the propagated surface acoustic waves are received by receiving elements located on the left side and the right side respectively.Type: ApplicationFiled: May 28, 2003Publication date: February 12, 2004Applicant: FUJITSU LIMITEDInventors: Takashi Katsuki, Fumihiko Nakazawa, Satoshi Sano, Yuji Takahashi
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Publication number: 20030234773Abstract: Surface acoustic waves are propagated in a lower-left oblique direction and a lower-right oblique direction from an excitation element located on the upper side of a non-piezoelectric substrate and then received by receiving elements located on the left side and the right side, while surface acoustic waves are propagated in an upper-left oblique direction and an upper-right oblique direction from an excitation element located on the lower side of the non-piezoelectric substrate and then received by the receiving elements located on the left side and the right side. Based on the received results at the two receiving elements, a position of an object in contact with the non-piezoelectric substrate is detected.Type: ApplicationFiled: January 29, 2003Publication date: December 25, 2003Applicant: FUJITSU LIMITEDInventors: Satoshi Sano, Takashi Katsuki, Yuji Takahashi, Fumihiko Nakazawa
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Publication number: 20030076308Abstract: In a touch panel device for detecting a position touched by an object by sensing an attenuation or break of surface acoustic waves, in which IDTs for exciting or receiving surface acoustic waves comprising comb-like electrode fingers aligned along confronting bus electrodes are placed on a peripheral area of a substrate, drawing electrodes connected to the bus electrode positioned closer to the center of the substrate and led out to the peripheral area side of the substrate are provided. Each of the IDT regions segmented by the drawing electrodes is constituted by repetition, and the drawing electrodes are disposed so that impedance in each IDT region becomes equal.Type: ApplicationFiled: January 25, 2002Publication date: April 24, 2003Applicant: Fujitsu LimitedInventors: Satoshi Sano, Takashi Katsuki, Yuji Takahashi, Fumihiko Nakazawa
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Publication number: 20030011577Abstract: A touch panel device is provided that can detect a touched position with sufficient resolution and accuracy without requiring high accuracy in process for forming a piezoelectric thin film. In the middle portion of the glass substrate, a substantially rectangular touch area is provided. In the periphery of the touch area, plural transmission comb electrodes arranged along one of the neighboring sides of the touch area and plural reception comb electrodes arranged along the other of the neighboring sides make pairs. Surface acoustic wave signals propagate from the transmission comb electrodes to the reception comb electrodes in a slanting direction with respect to four sides of the touch area. The inside edge of the piezoelectric thin film is formed linearly along the sides of the touch area.Type: ApplicationFiled: November 5, 2001Publication date: January 16, 2003Applicant: Fujitsu LimitedInventors: Takashi Katsuki, Fumihiko Nakazawa, Satoshi Sano, Yuji Takahashi
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Publication number: 20020171635Abstract: A surface acoustic waves is excited from an excitation element disposed on a substrate, the surface acoustic wave propagated on the substrate is received by a receiving element positioned on the substrate so as to face the excitation element, and the position of an object touching the substrate is detected based on the reception result. The wave number of a burst wave applied to excite the excitation element is made equal to the number of the comb-like electrode fingers of an IDT of the excitation element.Type: ApplicationFiled: September 25, 2001Publication date: November 21, 2002Applicant: Fujitsu LimitedInventors: Yuji Takahashi, Fumihiko Nakazawa, Satoshi Sano, Takashi Katsuki
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Publication number: 20020101408Abstract: Surface acoustic waves are excited in two diagonal directions from each of IDTs (excitation elements) disposed on the upper side and the lower side of a non-piezoelectric substrate, and the surface acoustic waves propagated on a detection region are received by IDTs (receiving elements) disposed on the left side and right side of the non-piezoelectric substrate so that a position of an object touching the non-piezoelectric substrate is detected based on the reception results. In each IDT, comb-like electrode fingers are joined to two facing electrode bases (signal electrode and ground electrode) in such a manner that the comb-like electrode fingers are inclined from a facing direction of the electrode bases.Type: ApplicationFiled: May 30, 2001Publication date: August 1, 2002Applicant: FUJITSU LIMTEDInventors: Satoshi Sano, Fumihiko Nakazawa, Takashi Matsuda, Yoshio Satoh, Takashi Katsuki, Yuji Takahashi
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Patent number: 6061479Abstract: An image reader apparatus includes an illuminating element to illuminate a document face to be read, an optical element to form an image of the document face illuminated by the illuminating element, an image sensor to photoelectrically convert the image formed by light passing through the optical element, and a running roller rotating in contact with the document face, wherein a horizontal distance between a document contact portion of the running roller where the running roller contacts the document and a center of imaging of the optical element is shorter than or equal to 10 mm.Type: GrantFiled: December 29, 1997Date of Patent: May 9, 2000Assignee: Fujitsu LimitedInventors: Yoshiro Ishikawa, Takashi Katsuki, Michio Miura, Satoshi Ueda, Ippei Sawaki, Fumitaka Abe
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Patent number: 6021003Abstract: An optical device including an optical imaging system for forming a real image of an object on a light-receiving surface, the optical imaging system including first and second cylindrical lenses and first and second intermediate lenses, each of the intermediate lenses being composed of a plurality of lens elements arrayed in a line, the first and second cylindrical lenses being opposed to each other so that generatrices thereof are parallel to each other, the first and second intermediate lenses being arranged between the first and second cylindrical lenses in a direction of the generatrices so that a light beam emanated from the object is condensed onto the light-receiving surface through the first cylindrical lens, the first intermediate lens, the second intermediate lens and the second cylindrical lens, wherein each of the lens elements is formed of a one-dimensional binary lens having a light-condensing property only in the direction of the generatrices, whereby a real image by the first and second cylindType: GrantFiled: September 10, 1998Date of Patent: February 1, 2000Assignee: Fujitsu LimitedInventors: Takashi Katsuki, Ippei Sawaki, Michio Miura, Satoshi Ueda, Fumitaka Abe